/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2019 Code Technology Studio
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package io.jpom;

import cn.hutool.core.io.FileUtil;
import cn.hutool.core.io.IoUtil;
import cn.hutool.core.util.StrUtil;
import com.github.dockerjava.api.DockerClient;
import com.github.dockerjava.api.async.ResultCallback;
import com.github.dockerjava.api.command.LogContainerCmd;
import com.github.dockerjava.api.exception.NotFoundException;
import com.github.dockerjava.api.model.Frame;
import io.jpom.util.LogRecorder;
import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.springframework.util.Assert;

import java.io.File;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.util.function.Consumer;

/**
 * @author bwcx_jzy
 * @since 2022/2/7
 */
public class DockerClientUtil {

    /**
     * 拉取容器日志
     *
     * @param dockerClient 连接
     * @param containerId  容器ID
     * @param charset      字符编码
     * @param consumer     回调
     * @throws InterruptedException 打断异常
     */
    public static void pullLog(DockerClient dockerClient, String containerId, Integer tail, Charset charset, Consumer<String> consumer) throws InterruptedException {
        Assert.state(tail == null || tail > 0, "tail > 0");
        // 获取日志
        LogContainerCmd logContainerCmd = dockerClient.logContainerCmd(containerId);
        if (tail == null) {
            logContainerCmd.withTailAll();
        } else {
            logContainerCmd.withTail(tail);
        }
        logContainerCmd
            .withStdOut(true)
            .withStdErr(true)
            .withFollowStream(true)
            .exec(new ResultCallback.Adapter<Frame>() {
                @Override
                public void onNext(Frame object) {
                    byte[] payload = object.getPayload();
                    if (payload == null) {
                        return;
                    }
                    String s = new String(payload, charset);
                    consumer.accept(s);
                }
            }).awaitCompletion();
    }

    /**
     * 将容器文件下载到本地
     *
     * @param dockerClient  容器连接
     * @param containerId   容器ID
     * @param logRecorder   日志记录
     * @param resultFile    结果文件
     * @param resultFileOut 保存目录
     */
    public static void copyArchiveFromContainerCmd(DockerClient dockerClient, String containerId, LogRecorder logRecorder, String resultFile, String resultFileOut) {
        logRecorder.info("download file from : {}", resultFile);
        try (InputStream stream = dockerClient.copyArchiveFromContainerCmd(containerId, resultFile).exec();
             TarArchiveInputStream tarStream = new TarArchiveInputStream(stream)) {
            TarArchiveEntry tarArchiveEntry;
            while ((tarArchiveEntry = tarStream.getNextTarEntry()) != null) {
                if (!tarStream.canReadEntryData(tarArchiveEntry)) {
                    logRecorder.info("不能读取tarArchiveEntry");
                }
                if (tarArchiveEntry.isDirectory()) {
                    continue;
                }
                String archiveEntryName = tarArchiveEntry.getName();
                // 截取第一级目录
                archiveEntryName = StrUtil.subAfter(archiveEntryName, StrUtil.SLASH, false);
                // 可能中包含文件 使用原名称
                archiveEntryName = StrUtil.emptyToDefault(archiveEntryName, tarArchiveEntry.getName());
                //logRecorder.info("tarArchiveEntry's name: {}", archiveEntryName);
                File currentFile = FileUtil.file(resultFileOut, archiveEntryName);
                FileUtil.mkParentDirs(currentFile);
                IoUtil.copy(tarStream, Files.newOutputStream(currentFile.toPath()));
            }
        } catch (NotFoundException notFoundException) {
            logRecorder.info("容器中没有找到执行结果文件: {}", notFoundException.getMessage());
        } catch (Exception e) {
            logRecorder.error("无法获取容器执行结果文件", e);
        }
    }

    /**
     * 删除容器
     *
     * @param dockerClient docker 连接
     * @param containerId  容器ID
     */
    public static void removeContainerCmd(DockerClient dockerClient, String containerId) {
        if (containerId == null) {
            return;
        }
        // 清除容器
        dockerClient.removeContainerCmd(containerId)
            .withRemoveVolumes(true)
            .withForce(true)
            .exec();
    }
}
